Fizz Factor Lab Activity
Fizz Factor Lab Activity
Life Science Biology • Reaction Rates & Cellular Respiration Modeling
Metabolic Kinetics
Student Name:
Lab Partner(s):
Date:
Class Period:
Biological Connection: Living cells depend on biochemical reactions (such as enzyme catalysis and cellular respiration) to sustain life. In this lab, the effervescent dissolution of sodium bicarbonate and citric acid produces \(\text{CO}_2\) gas, directly modeling metabolic gas production and how thermal kinetic energy accelerates molecular collision rates in living organisms.
Materials
- 2 Alka-Seltzer tablets
- 2 Clear beakers (250 mL)
- 100 mL Room temp water (\(\approx 20^\circ\text{C}\))
- 100 mL Warm water (\(\approx 40^\circ\text{C}\))
- Digital electronic scale (0.01g)
- Stopwatch / Digital timer
- Thermometer
Experimental Procedure
- Trial 1: Pour 100 mL of room temperature water into beaker. Measure water temperature.
- Place beaker + 1 whole tablet on scale together. Record Initial Total Mass (\(t = 0\text{s}\)).
- Drop tablet into water and start stopwatch simultaneously. Leave on scale.
- Record system mass every 15 seconds for 120 seconds as \(\text{CO}_2\) gas escapes.
- Calculate Cumulative Gas Released: \(\text{Mass at } 0\text{s} - \text{Current Mass}\).
- Trial 2: Repeat steps 1–5 using 100 mL of warm water (\(\approx 40^\circ\text{C}\)).
Quantitative Data Table: Gas Production Over Time
Record mass to nearest 0.01g
| Time (s) | Trial 1: Room Temp Water (___ °C) | Trial 2: Warm Water (___ °C) | Observations (Bubbling, Foam, Sound) |
|---|
| Total Mass (g) | Gas Released (g) | Total Mass (g) | Gas Released (g) |
| --- | --- | --- | --- |
| 0 s (Initial) | | 0.00 | |
| 15 s | | | |
| 30 s | | | |
| 45 s | | | |
| 60 s | | | |
| 75 s | | | |
| 90 s | | | |
| 105 s | | | |
| 120 s | | | |
Formula: \(\text{Gas Released (g)} = \text{Total Mass at } 0\text{s} - \text{Total Mass at Time } t\) Page 1 • Investigation Protocol & Data
Part 2: Data Graphing & Kinetics Analysis
Solid Line: Room Temp Dashed Line: Warm Water
Graph Requirements: Plot Cumulative Gas Released (g) on the Y-axis vs. Time (s) on the X-axis for both trials on the grid below.
T: Title A: Axes L: Labels+Units K: Key S: Scale
Graph Title: __________________________________________________________________________________
Cumulative Gas Released \(\text{CO}_2\) (g)
0
Time (seconds) [Suggested scale marks: 0s, 15s, 30s, 45s, 60s, 75s, 90s, 105s, 120s]
Part 3: Life Science Synthesis & Scientific Reasoning
1. Rate Analysis: Compare the steepness (slope) of your graph lines during the first 30 seconds versus the final 30 seconds. What does the leveling off (plateau) represent in terms of chemical reactants?
2. Molecular Kinetics: How did higher temperature affect the reaction velocity? Explain your observation using kinetic energy, molecular motion, and collision frequency between molecules.
3. Biological Analogy (Metabolism): Ectothermic animals (like lizards) depend on environmental heat. Using your graph, explain why a reptile's metabolic cellular respiration slows down significantly in cold weather.
4. Cellular Application (Surface Area): If you repeated this lab using a crushed tablet (powder) instead of a whole tablet, predict how the line graph would change. How does this model the advantage of small cell sizes in living organisms?
Key Skills: Multi-line Graph Construction, Collision Theory, Cellular Rate Kinetics Page 2 • Data Graphing & Synthesis
